Anchor for well-tubing.



' R'. G BAKEK ANCHOR PoR WELL TUBING.

APPLICATION TILBD NOV. 6. 19'11 Inventor Attorneys L! ff .4%. 42]. w

R. C. BAKER.

ANCHOR FOR WELL TUBING.

APPLICATION FILED NOV. 6, 1911 l Patented A191f 16, 1912.v

2 SHEETS-SHEET 2.

ZZ J7 Witnesses l Attorneys To all whom #may concern:

citizen of theV United States, residing at entran sr REUEN BAKER, or. coA'LINeA, CALIFORNIA.

ANCHOR Fon' Y i v Application l'ed November v.Be it known that I, REUBEN C. BAKR,' Coalinga,'i'n the county of Fresno and State of- California, have invented a new and useful'Anchor for lVelliTubing, of whichfjthefollowing is a specification.

This in\`fention relates t'o anchors for use in connection with tubes in deep wells."

Where -oil or the Alike is to be pumped fromwells of considerable depth,- it has been necessary heretofore Ato place in 'the well easing a tube having a pump onthe bottom endithereof, the sucker rods being arranged within this tubing so as to work the valves inthe pumpsfVVhere this arrangement of parts .is employed the tubing issuspended out the broken parts...

`movably. anchored V within the casing and thus prevented `from dropplng to 'the bot` ftom of the well. v

Another object is to provide means Whereby the gripping elementsof the anchor are automatically actuated should yt-he tubing 'part' before all parts of the structure l have been assembled.

lvlVith the foregoingand-other objects in vieivwhichA will, appear as the description proceeds,the invention resides vin the combination. and arrangement of'parts and in the details of construction hereinafter described'and claimed, it being understood u -that changes'in the precise embodimentof the invention herein disclosed. can bemadel lower portion of the anchor.

within thescope of what is yclaimed, with"V out departing from the. spirit of the invention. 'f

In the accompanying drawings the' preferred form In said drawings z-Figure 1 is `a cent-ral longitudinal section through the upper portion ofthe anchor within a well casing, the pipe of the". standing valve being indicated by dotted lines. Fig. 1a 1s a view of the Fig 2 1s a l Specification of LettersvPateiit.

" 'of which arejsecured to the' c ollar v13.

of ythe finvent-ion has, been" shown. f

WELL-TUBING.. i i

PafentedApr. 16,1912. 6, 1911.. e* serial No. 58,777; r

5 lsection' on line X-X 1. Fig. 3 is aV section on line YMY Fig. 1a. i Referring' to the figures by characters of reference 1 designates the upper tubular secexteriorly screw threaded for engagement with the couplingl 3 -inwliich is formeda seat 4 for the standing valve commonly used. The lower/'tubular section. 5 of the anchor has a ring 6 secured on tothey lower end thereof and thetwo sections 1 and 5 are connected by a coupling ring 7 tapered downwardly'so as to constitute a wedge'for -st-rps 8 are secured at the-ir'upper ends to the-inner face of the coupling ring 7 at pointsbetween the lsections 1 and 5 and these strips converge downwardly and terminate,

riveted or otherwise fastened shoes` 10 carrying antifriction rollers 11. These shoes are mounted to slide within openings 12 formed within the 'section 5 at diametricallyopposed points.` A collar lextends around thelower portion of the section k5 and'normally rests on vthev upper face ofthe ring 6. Spring strips 14; extend into and are securedto thiscollar and are adapted to slidev along the outer Vsurface'vof the section 5, the two spring strips `141 being located at diametri'cally op- -the strips lldverge upwardlyl andare se- .outer or working faces of these-shoes. being toothed, as indicated at 16. Under normal conditions the shoes 15 are in contact with the lowerend portion ,of the couplingl'? and the ShQeSQ 'are held'retracted into vthe section 5 bythe strips 14,'as'shown in Figjl.

Longitudinal slotsl 17 arefformed 'within `the' lower yportion of the s ectionff5 at dialmetrically opposed points and receive the end portionspf'a pivot rod 18 the terminall disk y119,/is pivotally hunted'on I'the' 'rod..1 8 at a pointofl centii and normally Vbears against a stop 2Q extending inwardly from the walll of 'the'sectifon' 5, `said-"stop -being preferably in the form of 4a pin seated at one end wiihin the. wall. The stop is of such length as to hold the disk normally extends from. one of the strips 14 and at their lower ends, in -ea'rs 9 to which are posed points. The upper `end portions of` inclined, as showxn in Fig. 1a.- A stoppin 2l4 tion of theanchor, the upper end of said v vsection being reduced, as at 2, and' beingV vthe purpose hereinafter `set forth.'- Spring cured togripping shoes 15 contacting loosely with the-wedging or coupling ring Y, the

thrugha longitudinal slot 22 in casing sec-v'v v yduring, this portion 'of the' operation, the

disk 1 8, upon striking the surface of the.

' iuid in the well, will be swung tothe position indicatedtin dotted lines in Fig. la, thus causing relative movement of the collar 13: and the casing section 5. 'The strips 14', which move with the collar 13, wil1 support the shoes 15 in position where they will be "promptly spread apart by the collar 7 so as to bring the toothed face 16 of each shoe in engagement -Withthe inner surface of the casing A. .The parts will thus be held auto-A matically and can be. easily reached for the purpose ot' raising them from the Well.

' lwill 'be lowered into the casing A until' the pump .has been y brought to the desired depth'.

The pump valves are then put in fast'to the s iicker rods. The bottom of the standing valve of every pump of this type is tapped to receive a section 'of pipe. This pipe section, which has been indicated -by .dotted lines at Bis utilized in the present structure "for the purpose of actuating the gripping shoes 15 underv certain conditions. After the standing valve has been' positioned' atv the bottom of the pump the. pipe B will extend down into the'anchor and shift the .strips 8 so as to force the shoes 15 intofengagement'w'ith the casing. Thus it will-be seen that should the tubing part Aor break the teethon thefshoes 1 5 vwill `prevent any of the structure from tom ofthe well.

yVhatjis claimed is A tubing anchor including upper -and lower sections, a tapered coupling therebei (so.

tween, downwardly converging spring strips f secured to the coupling and projecting into .5 I strips and mounted within openings in the lower section, spring' strips mounted upon.

'the lower section, shoes carried -by said Atheouter face of the lower section andadapted to be shifted outwardly by the-shoes, and casing gripping el-ements lcarried by said` strips, said elements beingi movable longitudinallyV of the section and against the coupling, said coupling constituting means for shifting the-shoes radially during such movement. y '2. A tubinganchor for attachment' to al It' the tubing should not part or break, it

dropping to the botpump, including a tubular portion;j spring elements mounted uponthe outer'ffage'of `said portion, gripping devicesarrid by the free ends of said y'elements-,df'iwnwardly converging resilient 'devices withinr the tubular portion, and means carried thereby and movable throughsaid tubular portion to 'engage the spring elements.

3. A tubing anchor including a tubularr portion, means mounted for ,movement lon-- gitudinally Atherein under theforce ofthe impact of a iiuid thereagainst, casing gripping 'elements shiftable with said means,`

and meanscarried by said `tubularportion for shifting said elements radially opposite directions and into engagement with thev casing during such longitudinal movement. 4l A tubing anchorf including vcasing gripping elements shiftable radially, a spreading element, and means operated .by impact upon fluid in the casing during'the downward movementof the anchor and coolperating with said spreadingv element, :tor s ifting said gripping elements into engagement with the casing.

' 5. A tubing-'anchor lncluding casing gripping elementswshit-able radially, a normally inclined flap Vpivotally mounted and shift' able longitudinally of .the anchor, connections between the iap and the gripping ele'- ments, and means coperating with said elements for shifting them radially during'the f movement ofthe l'ap relative to the anchor. 6. A. tubing anchor .including upper and lower sections, a coupling therebetween',`

downwardly `converging spring p strips. se-

cured Vto the couplingandprojecting into the lower section, shoes carried by said strips and mountedwithin openings in the lower' section, spring strips mounted: upon` the outer faceA of lthe lower section and adapted to be actuated by theshoes, and casing gripping 'elements carried by said strips.v 5.

. d 1Q lower sections, a tapered coupling ring con- 7. -A 'tubing anchor including upper an necting lthe* sections, a iiap pivotally and slid'ably'mounted 'within the vlower section, a

'collar extending around said'section .and 'movable with said flap', and yieldingly supported gri ping elements movable ywith the collar an .-shitable against the coupling ring, said vringv constituting means for shifting said elements-laterally into engagementl with theinner wall of the well casing.

In testimony that I claim the'foregoing as my own, I have hereto aiiixed my signature in the presencevof-two witnesses.

Witnesses N C. W. I-IUfroHrsoN',

yan. Smm.

REUBEN @sansa 

